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RS-232

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RS-485 INTERFACE CONVERTER

3

Contents

1.0 SPECIFICATIONS.............................................................................................................................4
2.0 INTRODUCTION.............................................................................................................................5
3.0 INSTALLATION................................................................................................................................7

3.1

Jumpers and DIP Switches....................................................................................................7

3.2

Select DTE/DCE Operation ..................................................................................................7

3.3

Physical Installation...............................................................................................................7

3.4

Indicators.............................................................................................................................11

3.5

Interface Pinouts .................................................................................................................14

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Summary of Contents for IC485A-R2

Page 1: ... day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com CUSTOMER SUPPORT INFORMATION SEPTEMBER 1993 IC485A R2 IC485C R2 RS 232 RS 485 Interface Converter DSR CTS DATA PWR DSR CTS DATA 232 485 ...

Page 2: ...in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not exceed the Class A limits for Radio nois...

Page 3: ...ERFACE CONVERTER 3 Contents 1 0 SPECIFICATIONS 4 2 0 INTRODUCTION 5 3 0 INSTALLATION 7 3 1 Jumpers and DIP Switches 7 3 2 Select DTE DCE Operation 7 3 3 Physical Installation 7 3 4 Indicators 11 3 5 Interface Pinouts 14 ...

Page 4: ...port DTE DCE jumper selectable RS 485 port DTE DCE jumper selectable Connectors RS 232 port 25 pin sub D female RS 485 port 37 pin sub D female Environmental Maximum Storage Temperature 158 F 70 C Maximum Operating Temperature 122 F 50 C Power 115 VAC power supply 10 100 mA rms 230 VAC power supply 10 50 mA rms Size IC485A R2 2 3 H x 8 W x 11 9 D 5 8 x 20 3 x 30 2 cm IC485C R2 1 2 H x 7 5 W x 11 4...

Page 5: ... is shown in Figure 2 3 2 0 Introduction IBM PC OR OTHER DTE DEVICE RS 232 RS 485 INTERFACE CONVERTER RS 232 PORT DCE RS 485 PORT DTE PINS 4 6 JUMPERED ON IC RS 485 DEVICE DCE B A PINS 22 24 ARE JUMPERED ON THE INTERFACE CONVERTER DB25 STRAIGHT CABLE Figure 2 1 2 Wire Asynchronous Application NOTE The two and four wire application diagrams illustrate only the wiring of the data leads All other lea...

Page 6: ... It operates in either 115 VAC or 230 VAC applications The rack RM060 has its own power supply which is switchable between 115 and 230 VAC operation IBM PC OR OTHER DTE DEVICE RS 232 RS 485 INTERFACE CONVERTER RS 232 PORT DCE RS 485 PORT DTE GROUND OPTIONAL RS 485 DEVICE DCE 22 4 24 6 19 R R T T GND DB25 STRAIGHT CABLE Figure 2 2 4 Wire Asynchronous Application TYPICAL CABLE CONFIGURATION FOR IBM ...

Page 7: ...or connecting RS 485 Data Communications Equipment DCE to RS 232 Data Terminal Equipment DTE The second configuration is for connecting RS 232 DCE to RS 485 DTE These settings are determined by DIP shunt settings located inside the unit on the printed circuit board To set the interfaces refer to Figure 3 1 for their location and then set the DIP shunts according to Table 3 2 3 0 Installation Table...

Page 8: ... RS 232 CONNECTOR DIP SHUNTS DIP SHUNTS DSR CTS DATA RS 422 INDICATORS POWER DSR CTS DATA RS 232 INDICATORS XW1A XW2A XW3A XW4A XW4B XW5A XW5B XW1B XW2B XW3B CR8 CR5 CR6 CR10 CR9 CR4 CR7 S1 RACK POWER CONNECTOR Figure 3 1 Component Layout RS 485 CONNECTOR RS 485 INDICATORS ...

Page 9: ...PTER 3 Installation 9 Table 3 2 DTE DCE DIP Shunts Settings RS 485 PORT RS 232 PORT To appear as Put a shunt in To appear as Put a shunt in DTE XW1A DTE XW4A XW2A XW5A XW3A DCE XW1B DCE XW4B XW2B XW5B XW3B ...

Page 10: ...8 Position B C RS 485 transmitters are always enabled This position should be selected for four wire applications Position A B tri state control line of the RS 485 transmitters is driven by the RS 232 equipment s RTS CTS circuit NOTE When W8 is in the B C position it overrides W9 and W10 W9 Select RTS CTS signal source for the RS 485 port as follows Position A B RS 485 RTS CTS signal is driven by ...

Page 11: ...icators reflect conditions on the RS 485 interface DSR Data Set ready CTS Clear To Send and Data One indicator located in the center of the front panel PWR Power indicates when power is applied to the unit Figures 3 2 and 3 3 illustrate signal flow in DTE and DCE configurations NOTE Some LEDs may be lit when no input signal is present This is not a malfunction but a floating state condition at the...

Page 12: ...RS 232 RS 485 INTERFACE CONVERTER 12 Figure 3 2 Signal Flow Diagram A ...

Page 13: ...CHAPTER 3 Installation 13 Figure 3 3 Signal Flow Diagram B ...

Page 14: ...RY RECEIVED LINE SIGNAL INDICATOR SECONDARY CLEAR TO SEND SIGNAL DESTINATION PIN NUMBER PIN NUMBER SIGNAL DESTINATION RS 232 Interface Female Figure 3 4 RS 232C Interface Figure 3 5 RS 485 Interface 1 SHIELD 2 SIGNALING RATE INDICATOR 3 4 SEND DATA A 5 SEND TIMING A 6 RECEIVE DATA A 7 REQUEST TO SEND A 8 RECEIVE TIMING A 9 CLEAR TO SEND A 10 LOCAL LOOPBACK 11 DATA MODE A 12 TERMINAL READY A 13 REC...

Page 15: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1993 Black Box Corporation All rights reserved ...

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